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Cutaneous respiration and respiration by diffusion

What is the basic difference between cutaneous respiration and respiration by diffusion? Does blood contribute in the cutaneous respiration?

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Cutaneous respiration is not as easy as diffusion. In diffusion the gases diffuse directly among the exterior atmosphere and cells. In cutaneous respiration, molecular oxygen penetrates via the skin and it is collected by the blood circulation which then distributes the gas to the tissues. Carbon-dioxide is as well collected from the tissues by blood and taken to the skin to be removed to the atmosphere. Therefore there is significant participation of blood in the cutaneous respiration.

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